[issue23027] test_warnings fails with -Werror

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

The patch fixes an error, but produces a warning about changed filters. The patch in issue18383 should fix it.

The patch LGTM, but I left one question on Rietveld.

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dependencies: +test_warnings modifies warnings.filters when running with "-W default"
stage: patch review -> commit review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23027>
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